Answer:
The answer is: An action is morally correct if it can be universalized.
Explanation:
Immanuel Kant was a German philosopher, his categorical imperative concept first appeared in his work Groundwork of the Metaphysics of Morals (1785), where he talked about a moral law that is absolute for all agents – everyone could do it – it doesn’t depends on any motive or end. That means that an action is morally acceptable if it could rationally be willed to be universal law; It is The concept of universalizability.